by Dr. Sofyan Syafri Harahap, M.S,Ac $11.00
by Mahmud Thoha, APU $8.00
by Dr. Hj. Zaitunah Subhan $7.00
by Drs. Ng. Phillips $9.00
by Prof. Dr. S. Nasution, M.A. $7.00
by Soerjono Soekanto $12.00